==== run-regress-xonly ====
cc -O2 -pipe  -g -Wall -Wpointer-arith -Wuninitialized -Wstrict-prototypes -Wmissing-prototypes -Wunused -Wsign-compare -Wshadow  -MD -MP  -c /home/src/regress/sys/kern/xonly/xonly.c
cc   -o xonly xonly.o 
./xonly
                                      userland     kernel
ld.so                  0xc6930218190  P readable   P unreadable
mmap xz                0xc6981932000  P unreadable P unreadable
mmap x                 0xc68f3e53000  P readable   P readable  
mmap nrx               0xc68f1edf000  P readable   P readable  
mmap nwx               0xc69b0898000  P readable   P readable  
mmap xnwx              0xc69b4507000  P readable   P readable  
main                   0xc66b663c420  P readable   P unreadable
libc                   0xc6941c52030  P readable   P unreadable